19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
In the cyclo-S8 molecule of rhombic sulphur, all the S—S bond lengths and all the S—S—S bond angles are respectively (approximate values)
Which of the following is/are correct?
O3 cannot oxidise:
A green coloured solution of a salt changes its colour to light pink on passing ozone through it. Which of the following species represent pink and green colour respectively ?
In the presence of water, sulphur is oxidized by ozone to give
The gases absorbed by alkaline pyrogallol and oil of cinnamon are respectively
At room temperature, O3 is absorbed by
Ozone is an extremely powerful oxidizing agent. It is
Which of the following statements is correct?
Ozonized oxygen is a mixture of
Ozone is prepared by the action of silent electric discharge upon oxygen in an apparatus called ozonizer. The reaction
In ozone, the central oxygen atom uses
Which of the following has pπ – dπ bonding ? (a) NO (b) SO (c) BO (d) CO
The number of lone pairs and the number of S—S bonds in S8 molecules are respectively:
Which of the following statements regarding sulphur is incorrect?
The stability of the hydrides of oxygen, sulphur, selenium and tellurium decreases in the order
Oxygen is more electronegative than sulphur, yet H2S is acidic in nature while H2O is neutral because:
In which of the following species, S-atom assumes sp3 hybrid state? (I) SO3 (II) SO2 (III) H2S (IV) S8
Group 16 elements (except polonium) are called chalcogens because
The number of P—O—P bonds in cyclic metaphosphoric acid is
The number of P–O–P bonds in the structure of phosphorus pentoxide and phosphorus trioxide are respectively (2005)
PCl5 on hydrolysis gives
White phosphorus reacts with NaOH to give PH3 and NaH2PO2. This reaction involves
On boiling phosphorus with KOH solution, product formed is
The reaction of P4 with X leads selectively to P4O6. The X is: